Technology · Go
stdlib (Go) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 178 vulnerabilities in stdlib (Go): 1 in the last 7 days and 10 in the last 90 days, 4 of them critical and 1 exploited in the wild. The most recent, CVE-2026-97054, was published on 11 November 2026. 1 vulnerability in the last four weeks, down 87% on the four before (8). 0 critical against 1.
- Last 7 days
- 1
- Last 90 days
- 10
- Critical, all time
- 4
- Exploited in the wild
- 1
About stdlib (Go)
Go programming language standard library.
Latest stdlib (Go) vulnerabilities
- CVE-2026-97054: Go HTTP/1 server race condition in MaxBytesReader header handlinginfoEPSS 0.2%
- CVE-2026-111943: Go crypto/x509 untrusted intermediate certificate validationhighEPSS 0.1%
- CVE-2026-97031: Go crypto/tls malformed ECH extension DoShighCVSS 7.5EPSS 0.4%
- CVE-2026-97030: Go html/template XSS via missing ES2015+ keywordsmediumCVSS 6.1EPSS 0.2%
- CVE-2026-94448: Go html/template XSS via stale context in consecutive expressionsmediumCVSS 6.1EPSS 0.2%
- CVE-2026-94440: Go memory limit bypass in MIME header parsinghighCVSS 7.5EPSS 0.4%
- CVE-2026-94439: Go net/http HTTP/1 server CONNECT response desynchronizationhighCVSS 7.5EPSS 0.3%
- CVE-2026-78667: Go net/http denial of service in Range header parsinghighCVSS 7.5EPSS 0.4%
- CVE-2026-56866: Go net/http HTTP/1 client connection desynchronization after CONNECT rejectionhighCVSS 7.5EPSS 0.3%
- CVE-2026-56857: Go os.Root.Mkdir/MkdirAll junction escape on WindowscriticalCVSS 9.8EPSS 0.5%
- CVE-2026-56860: Go path resolution denial of service via parent directory segmentsmediumCVSS 5.9EPSS 0.5%
- CVE-2026-56859: Go DecodeElement stack exhaustion vulnerabilityhighCVSS 7.5EPSS 0.6%
- CVE-2026-56858: Go path traversal with unescaped forward slashmediumCVSS 6.1EPSS 0.3%
- CVE-2026-56853: Go HTTP/2 timeout bypass in unencrypted connectionshighCVSS 7.5EPSS 0.6%
- CVE-2026-33818: Go Unmarshal stack exhaustion in recursive structure parsinghighCVSS 7.5EPSS 0.6%
- CVE-2026-56862: GO-2026-6090 - Limit handshake messages we are willing to accept post-handshake in crypto/tlsinfoEPSS 0.6%
- CVE-2026-46600: Google Go x/net denial of service in dnsmessage parsinginfoEPSS 0.6%
- CVE-2026-42505: Go crypto/tls information disclosure in Encrypted Client HelloinfoCVSS 0EPSS 0.4%
- CVE-2026-39822: Go os package path traversal via symlink with trailing slash in os.RootinfoEPSS 0.2%
- CVE-2026-42507: Google Go log injection in net/textproto packageinfoEPSS 0.4%
- CVE-2026-42504: Google Go CPU exhaustion in mime WordDecoder.DecodeHeaderinfoCVSS 0EPSS 0.6%
- CVE-2026-27145: Google Go CPU denial of service in crypto/x509 VerifyHostnameinfoCVSS 0EPSS 0.6%
- CVE-2026-39821: Go x/net idna privilege escalation via Punycode decodingcriticalCVSS 9.6EPSS 0.7%
- CVE-2026-42499: Google Go net/mail denial of service in consumePhrasehighCVSS 7.5EPSS 0.8%
- CVE-2026-39836: Google Go Denial of Service in net Package on WindowshighCVSS 7.5EPSS 0.6%
Most severe stdlib (Go) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2020-0601: GO-2022-0535 - Certificate validation bypass on Windows in crypto/x509criticalexploited in the wildCVSS 8.1EPSS 89.4%
- CVE-2026-56857: Go os.Root.Mkdir/MkdirAll junction escape on WindowscriticalCVSS 9.8EPSS 0.5%
- CVE-2026-39821: Go x/net idna privilege escalation via Punycode decodingcriticalCVSS 9.6EPSS 0.7%
- CVE-2025-22871: Go net/http request smuggling via bare LF in chunked encodingcriticalCVSS 9.1EPSS 0.8%
- CVE-2026-33810: Google Go crypto/x509 improper DNS constraint validationhighCVSS 8.2EPSS 0.3%
- CVE-2020-16845: Go encoding/binary infinite loop in ReadUvarint and ReadVarinthighCVSS 7.5EPSS 4.7%
- CVE-2025-61726: Go net/url memory exhaustion in query parameter parsinghighCVSS 7.5EPSS 2.3%
- CVE-2026-33811: Go net package double-free in cgo DNS resolverhighCVSS 7.5EPSS 0.9%
- CVE-2026-39820: Go net/mail denial of service in email and date parsinghighCVSS 7.5EPSS 0.9%
- CVE-2026-42499: Google Go net/mail denial of service in consumePhrasehighCVSS 7.5EPSS 0.8%
Vulnerabilities per week
1 vulnerability in the last four weeks, down 87% on the four before (8). 0 critical against 1. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 8 | 1 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 1 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 1 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many stdlib (Go) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/go-stdlib)<a href="https://junglewise.ai/threats/technologies/go-stdlib"><img src="https://junglewise.ai/threats/technologies/go-stdlib/badge.svg" alt="stdlib (Go) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/go-stdlib.json, and this page as text at https://junglewise.ai/threats/technologies/go-stdlib.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "stdlib (Go) vulnerabilities", https://junglewise.ai/threats/technologies/go-stdlib, 13 November 2026.